Results 111 to 120 of about 4,234 (227)

Digital Beamforming: A Paradigm Shift for Spaceborne SAR

open access: yes, 2013
Spaceborne Synthetic Aperture Radar (SAR) provides high-resolution, day-and-night and weather-independent images for a multitude of applications ranging from geoscience and climate change research, environmental monitoring, global 2-D and 3-D mapping ...
Moreira, Alberto
core  

Adaptive waveform design for cognitive radar [PDF]

open access: yes, 2014
Advances in technology, especially in sensing, robotics, wireless communications, hardware capabilities and the constant need to confront not only the existing but also new and advanced threats are pushing for the need of advanced radar techniques.
Tsistrakis, Georgios
core  

Nonlinear Waveform Sensing for Cognitive Radar Based on Reinforcement Learning

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Cognitive radar automatically adjusts its waveform via ceaseless interaction with the environment and learning from the experience. Compared with the linear frequency modulation (LFM) that has been commonly adopted in cognitive radars, the nonlinear FM ...
Peikun Zhu   +3 more
doaj   +1 more source

Spaceborne Radar Technologies for Earth Remote Sensing

open access: yes, 2007
Synthetic Aperture Radar (SAR) is an indispensable source of information in earth observation since SAR is the only spaceborne sensor that has highresolution, all-weather and day-and-night imaging capability.
Moreira, Alberto
core  

WAVEFORM DESIGN WITH POLYNOMIAL PHASE IN MODERN RADAR SYSTEMS

open access: yes
This research examines radar waveform design, interference mitigation, and performance optimization in modern radar systems, with a focus on multi-sensor setups and dynamic target detection.
AMAR, Robin
core  

Energy Sharing and Performance Bounds in MIMO DFRC Systems: A Trade-Off Analysis

open access: yesIET Signal Processing
It is a fundamental problem to analyze the performance bound of multiple-input multiple-output dual-functional radar-communication systems. To this end, we derive a performance bound on the communication function under a constraint on radar performance ...
Ziheng Zheng   +4 more
doaj   +1 more source

Techniques for homodyne dechirp-on-receive linearly frequency modulated radar

open access: yes, 2011
This thesis presents work done to extend and improve the operation of homodyne dechirp-on-receive linearly frequency modulated radars. First, an investigation of the effect of common phase errors on the point response function of the radar is ...
Middleton, Robert
core  

Optimal Waveform Design for Dual-functional MIMO Radar-Communication Systems [PDF]

open access: yes, 2019
This paper considers the waveform design for dual-functional multi-input-multi-output (MIMO) radar-communication systems. Two optimization-based novel waveform designs are proposed.
Jiang, W   +6 more
core  

Design and implementation of a non-contact microwave level measument instrument

open access: yes, 2010
Includes abstract.Includes bibliographical references (leaves 104-110).This dissertation describes the design and implementation of a microwave level measurement instrument for sensing the level of a substance inside a tank up to 10 m in height.
Ward, Jonathan Michael
core  

A Concept for a High Performance Reflector-Based X-Band SAR

open access: yes, 2010
The success of current spaceborne Synthetic Aperture Radar (SAR) is boosting the performance requirement of next generation systems. In order to cope with the evolution of SAR the design of the new systems will need to meet higher requirements for ...
Patyuchenko, Anton   +4 more
core  

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